Decorative surface of a tire sidewall



FIG. 1 is a perspective view of decorative surface of a tire sidewall;

FIG. 2 is a front elevational view thereof;

FIG. 3 is an enlarged front elevational view thereof; and,

FIG. 4 is an enlarged fragmentary front elevational view thereof.

The broken line showing of a tire is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a decorative surface of a tire sidewall, as shown and described. 